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Appl Radiat Isot. 2015 Feb;96:27-35. doi: 10.1016/j.apradiso.2014.10.026. Epub 2014 Nov 11.

Validation of the neutron and gamma fields in the JSI TRIGA reactor using in-core fission and ionization chambers.

Author information

1
Jožef Stefan Institute, Jamova cesta 39, SI-1000 Ljubljana, Slovenia; Faculty of Mathematics and Physics, University of Ljubljana, Jadranska ulica 19, SI-1000 Ljubljana, Slovenia. Electronic address: gasper.zerovnik@ijs.si.
2
Jožef Stefan Institute, Jamova cesta 39, SI-1000 Ljubljana, Slovenia. Electronic address: tanja.kaiba@gmail.com.
3
Jožef Stefan Institute, Jamova cesta 39, SI-1000 Ljubljana, Slovenia; CEA, DEN, DER, Instrumentation, Sensors and Dosimetry Laboratory, Cadarache, F-13108 St-Paul-Lez-Durance, France. Electronic address: vladimir.radulovic@ijs.si.
4
Jožef Stefan Institute, Jamova cesta 39, SI-1000 Ljubljana, Slovenia. Electronic address: anze.jazbec@ijs.si.
5
Jožef Stefan Institute, Jamova cesta 39, SI-1000 Ljubljana, Slovenia. Electronic address: sebastjan.rupnik@ijs.si.
6
CEA, DEN, DER, Instrumentation, Sensors and Dosimetry Laboratory, Cadarache, F-13108 St-Paul-Lez-Durance, France. Electronic address: loic.barbot@cea.fr.
7
CEA, DEN, DER, Instrumentation, Sensors and Dosimetry Laboratory, Cadarache, F-13108 St-Paul-Lez-Durance, France. Electronic address: damien.fourmentel@cea.fr.
8
Jožef Stefan Institute, Jamova cesta 39, SI-1000 Ljubljana, Slovenia. Electronic address: luka.snoj@ijs.si.

Abstract

CEA developed fission chambers and ionization chambers were utilized at the JSI TRIGA reactor to measure neutron and gamma fields. The measured axial fission rate distributions in the reactor core are generally in good agreement with the calculated values using the Monte Carlo model of the reactor thus verifying both the computational model and the fission chambers. In future, multiple absolutely calibrated fission chambers could be used for more accurate online reactor thermal power monitoring.

KEYWORDS:

Fission chamber; Ionization chamber; MCNP; Neutron flux and spectrum; Research reactor; TRIGA; Thermal power calibration

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